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 A049723 Array T read by diagonals; T(i,j)=number of lattice points (x,y) in closed right half-plane and circle with radius (0,0)-to-(i,j). 10
 1, 4, 4, 9, 6, 9, 18, 13, 13, 18, 29, 22, 15, 22, 29, 46, 33, 26, 26, 33, 46, 63, 50, 39, 35, 39, 50, 63, 82, 67, 54, 46, 46, 54, 67, 82, 107, 88, 71, 60, 56, 60, 71, 88, 107, 136, 115, 96, 79, 75, 75, 79, 96, 115, 136, 169, 140, 119, 100 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Specifically, -i<=x<=i, 0<=y<=j, x^2 + y^2 <= i^2 + j^2. LINKS Table of n, a(n) for n=0..58. EXAMPLE Diagonals (each starting on row 1): {1}; {4,4}; {9,6,9}; ... CROSSREFS T(n, 0)=A036695(n). Sequence in context: A035116 A088613 A351582 * A010661 A051668 A005441 Adjacent sequences: A049720 A049721 A049722 * A049724 A049725 A049726 KEYWORD nonn,tabl AUTHOR Clark Kimberling STATUS approved

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Last modified November 28 05:33 EST 2023. Contains 367394 sequences. (Running on oeis4.)